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    <title>Document</title>
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<body>
    <script>
         // 匿名函数
         var f = function(){};
        //ES5
        console.log(f.name); //""
        //ES6
        console.log(f.name); //"f"
        //具名函数
        const myfun = function fun(){};
        //ES5
        console.log(myfun.name); //"un"
        //ES6
        console.log(myfun.name); //"fun"
    </script>
</body>
</html>